User-1838255255 posted
Hi Manishamani,
According to your description and needs, as far as i know, the collection class is belong to namespace System.Collections.ObjectModel, so the relationship is like parent and children.
About the introduction of them and how to use them, please check the following tutorials:
Collections (C#):
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/collections
Collection<T> Class:
https://msdn.microsoft.com/en-us/library/ms132397%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396
Best Regards,
Eric Du